基于PBL的经济管理实验教学变革研究

作为构建主义教学改革模式中广泛采用的核心思路,PBL在实现实验教学目标、提升能力与素质培养层次与质量、完善学科与教学体系等方面有着重要意义。针对经济管理专业综合性、设计性和创新性实验中的应用与实践,基于PBL的实施过程构建集成化的基于PBL的实验教学体系,并面向知识创造与共享在经济管理实验中开展PBL的应用是当前变革的主要方向与途径。     

标校机便携式测试系统的设计与实现

分析了“北斗”一号标校系统现状,指出了当前标校系统所面临的问题,提出了解 决问题的方法,设计并实现了标校机便携式测试系统。整个系统软硬件有机结合,具有体积 小、 重量轻、携带操作使用方便的优点,特别适用于现场测试,保障了标校系统设备能正常可靠地 服务于“北斗”一号卫星导航定位系统。     

基于基带信号包络的数字AGC设计与实现

在卫星扩频通信系统中,通常采用自动增益控制(Automatic Gain Control,AGC)技 术解决大动态的信号起伏和干扰,以实现扩频信号的快速捕获和跟踪。分析了扩频接收机基 带信号数字采样门限,通过用信号包络功率值作为AGC控制信号,实现了接收基带信号大 动态范围的信号处理,完成了数字AGC自适应控制。利用扩频信号进行完全捕获后的包络信 号作为AGC信号可以有效防止信号捕获过程中多普勒频移等引起的失锁和误捕,实现 扩频接收机RF（射频）信号大动态范围的信号控制。     

Counting outputs,capital inputs and caring labor: Estimating gross household product

The estimation of Gross Household Product, the economic value added by the unpaid work and own capital of households outside the boundary of the System of National Accounts, should be addressed through household input-output satellite accounts which count household outputs, value them at market prices, and include an allowance for capital as a factor of production. This paper uses internationally comparable survey data to estimate the relative magnitudes of the gender division of the millions of hours of paid, unpaid and total work in twelve OECD countries, puts a dollar value on Gross Household Product in Australia, looks more closely at who provides care and nurture in households and suggests some urgent issues for attention.     

一种新的卫星通信网流量预测算法

在通信网络的设计中,使用基于流量预测的网络规划已成为LTE发展的必然趋势。与 地面网络不同,卫星网络由于受资源受限和拓扑时变的不利影响,其流量预测算法必须能兼 顾精度和效率,这令传统的地面网络预测方法已不再适用。为了解决以上问题,提出了一种 新的基于小波回声状态网络的流量预测算法,该算法通过小波多尺度分解的信号处理方法屏 蔽了网络流量的噪声,而后结合了无反馈的回声状态网络联合进行预测。仿真证明,新算法 相比传统算法能大幅提升网络流量的预测精度和运行效率,为卫星网络的流量规划提供了 强有力的决策支持。     

一种多功能海事卫星电话的造型与结构设计

针对多功能海事卫星电话的结构特点,提出了详细的设计流程。按照所提出的设计流 程,分别对该产品的结构总体设计、造型设计和详细的结构设计进行了论述。设计的多功能 海事卫星电话在结构上具有以下特点:电话主机可水平360°范围内自由旋转,可前后90°范 围内自由俯仰调节;话筒组件也能够根据用户使用要求和使用习惯进行前后俯仰角的自由调 节。     

基于通信转发器的扩频测距技术

针对航天器测控中利用卫星通信转发器实现多站测距进行可行性分析,在扩频测距 帧测距原理的基础上,研究利用卫星转发器对上行测距信号变频转发来实现对星测距,同时 对卫星工程测控与应用系统之间上下行链路功率分配、标校方法、地面测量设备组成原理等 关键技术进行分析论述。该测距方案突破了传统多站测距时受卫星应答机配置数量的限制条 件,实现多站同时测距后,可以提高测距精度和定轨精度,降低对设备测角精度的要求,减 少测轨时间,有效缓解测控设备资源紧张的状况,同时该测距方式还可作为应答方式侧音测 距的有效技术备份手段。     

A commentary on ‘The long road to publishing: A user-friendly exposé’

Many of the pressing questions currently facing accounting education researchers are best addressed through experimental research. For example, experiments are useful in testing the effect of innovative educational practices on student learning. The purpose of this paper is to briefly review the literature addressing sources of invalidity which may cloud the results of experiments and describe several procedures which are helpful in controlling for these sources of invalidity. Examples are provided, from published accounting education research studies, which illustrate how researchers have attempted to address several of these threats to validity. Experiments must be carefully planned and designed, so the experiment on completion fulfills the objectives of the researcher. Although experiments are more difficult to conduct in the educational environment than in a scientist's laboratory, many procedures are available to assist accounting education researchers in designing tightly controlled experiments.     

Ethics and Economics in International Business Education: A Comparison of Kuwaiti and U.S. Students Using an Ultimatum Game Scenario

In the past 20 years a body of research in behavioral and experimental economics has challenged classical economic theory. Yet, this body of research seems relatively unknown in business education. One behavioral test with implications for international business education has been the use of ultimatum games, which has more recently expanded to cross-cultural studies. Yet, virtually no cross-cultural studies have been conducted for subjects in Middle Eastern countries. One of the central findings from ultimatum game research and other variations is that individuals place a high value on fairness in transactions, a fundamentally ethical concept. This article reports a preliminary study of Kuwaiti and U.S. business students. Results are consistent with previous studies, showing Kuwaiti subjects to be in line with subjects from developed economies. Discussion includes the implications for management and business educators.